Start with the scope, not the total
Two roof estimates can show very different prices because they may not include the same work. Before comparing totals, check whether tear-off, underlayment, flashing, ventilation, decking allowances, disposal, permits, and cleanup are handled the same way.
Roofing materials should be specific
A useful estimate should identify the roofing product or system, underlayment, starter, ridge material, flashing approach, ventilation components, and other major materials rather than relying on vague wording.
Homeowner tip
Ask the contractor to show you photos or explain the specific roof detail being discussed. Written scopes are easier to compare when materials and responsibilities are clearly identified.
Look closely at decking allowances
Contractors often cannot know the full condition of roof decking until the existing roofing is removed. The proposal should explain how damaged decking will be priced if additional replacement is needed.
Flashing and penetrations matter
Chimneys, walls, skylights, valleys, pipe penetrations, and roof-to-wall transitions can require different flashing details. Ask whether existing flashing will be reused, repaired, or replaced.
Ventilation belongs in the estimate
Intake and exhaust ventilation can affect roof performance. The estimate should make clear whether vents, ridge vent, soffit work, or other ventilation changes are included.
Payment terms and warranties
The proposal should explain deposits, progress payments, final payment, material warranties, workmanship warranties, exclusions, and who handles permit or inspection requirements.